<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <style type="text/css">
        textarea {
            width: 300px;
            height: 300px;
        }

        .button {
            width: 100px;
        }
    </style>
</head>
<body onload="init()">
    <script type="text/javascript">
        //使用HTML5 Web存储的localStorage和sessionStorage方式进行Web页面数据本地存储。
        //页面参考如下图，能将页面上的数据进行本地存储。并能读取存储的数据显示在页面上。
        var t1;
        var t2;
        var oStorage;
        var oStorage;
        function init() {//初始化t1，t2
            t1 = document.getElementById("t1");
            t2 = document.getElementById("t2");
            sStorage = window.sessionStorage;
            lStorage = window.localStorage
        }
        function saveSession() {
            sStorage.mydata = t2.value;
            t1.value += "sessionStorage保存mydata:" + t2.value + "\n";
        }
        function readSession() {
            t1.value += "sessionStorage读取mydata:" + sStorage.mydata + "\n";
        }
        function cleanSession() {
            t1.value += "sessionStorage清除mydata:" + sStorage.mydata + "\n";
            sStorage.removeItem("mydata");
        }
        function saveStorage() {
            lStorage.mydata = t2.value;
            t1.value += "localStorage保存mydata:" + t2.value + "\n";
        }
        function readStorage() {
            t1.value += "localStorage读取mydata:" + lStorage.mydata + "\n";
        }
        function cleanStorage() {
            t1.value += "localStorage清除mydata:" + lStorage.mydata + "\n";
            lStorage.removeItem("mydata");
        }
    </script>
    <div>
        <textarea id="t1"></textarea><br />
        <label>需要保存的数据: </label>
        <input type="text" id="t2" /><br />
        <input type="button" class="button" onclick="saveSession()" name="b1" value="session保存" />
        <input type="button" class="button" onclick="readSession()" value="session读取" />
        <input type="button" class="button" onclick="cleanSession()" value="session清除" /><br />
        <input type="button" class="button" onclick="saveStorage()" value="local保存" />
        <input type="button" class="button" onclick="readStorage()" value="local读取" />
        <input type="button" class="button" onclick="cleanStorage()" value="local清除" />
    </div>
</body>
</html>